Bosch WR 400 -8 K..G Series - Electrical Wiring and Technical Specifications; Wiring Diagram Analysis; Detailed Technical Data

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2. Technical Data
1.5 Wiring Diagram
Diagram 3
1 - Servo gas valve
2 - Membrane valve
3 - Pilot gas valve
4 - Sensor electrode
5 - Sparking plug
6 - Temperature limiter
7 - Ignition unit
8 - Hydrogenerator
9 - Switch
10 - Led failure indicator
11 - Led indicator main burner condition
Appliance Ratings WR 250 - 8... WR 325 - 8... WR 400 - 8...
Rated output MJ/h (kW)
63 (17,5) 82 (22.75) 101 (28)
Rated input MJ/h (kW)
79 (22,0) 104 (29,0) 127 (35,3)
Gas inlet pressures
Natural gas kPa (mbar)
1,11 (11,1) 1,11 (11,1) 1,11 (11,1)
LP gases kPa (mbar)
2,75 (27,5) 2,75 (27,5) 2,75 (27,5)
Gas consumption
(based on gross c.v. at 15°C/60°F - 1013 mbar - dry
Natural gas
(10,5 kWh/m
3
- 9000 kcal/m
3
- 37,8 MJ/m³)
m³/h
2,1 2,8 3,4
LP gas
(13,8 kWh/m
3
- 11800 kcal/m
3
- 49,6 MJ/kg)
kg/h
1,6 2,1 2,6
Water data
Max. water flow l/min.
10 13 16
Temperature rise °C
25 25 25
Min. inlet water pressure bar
0.6 1,0 1,3
kPa
60 100 130
Min. water flow l/min.
222
Temperature rise °C
50 50 50
Min. inlet water pressure bar
0,3 0,4 0,5
kPa 30 40 50
Burner pressure for maximum output
Natural gas kPa (mbar)
0,89 (8,9) 0,84 (8,4) 0,78 (7,8)
LP gases kPa (mbar)
2,60 (26,0) 2,60 (26,0) 2,60 (26,0)
Burner pressure for minimum output
Natural gas kPa (mbar)
0,15 - 0,25 (1,5 - 2,5) 0,15 - 0,25 (1,5 - 2,5) 0,15 - 0,25 (1,5 - 2,5)
LP gases kPa (mbar)
0,35 - 0,65 (3,5 - 6,5) 0,35 - 0,65 (3,5 - 6,5) 0,35 - 0,65 (3,5 - 6,5)
Main burner injectors
Natural gas Ø mm 1,20 1,30 1,30
LP gases Ø mm 0,75 0,79 0,76
Pilot burner injector
Natural gas (Identity nr.) 19 19 19
LP gases (Identity nr.) 74 74 74